81314192827 has 24 divisors (see below), whose sum is σ = 95342773680. Its totient is φ = 69143961600.

The previous prime is 81314192779. The next prime is 81314192833. The reversal of 81314192827 is 72829141318.

It is not a de Polignac number, because 81314192827 - 2¹¹ = 81314190779 is a prime.

It is a super-2 number, since 2×81314192827² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81314192837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10900683 + ... + 10908139.

It is an arithmetic number, because the mean of its divisors is an integer number (3972615570).

Almost surely, 2^81314192827 is an apocalyptic number.

81314192827 is a deficient number, since it is larger than the sum of its proper divisors (14028580853).

81314192827 is a wasteful number, since it uses less digits than its factorization.

81314192827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9211 (or 9204 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The spelling of 81314192827 in words is "eighty-one billion, three hundred fourteen million, one hundred ninety-two thousand, eight hundred twenty-seven".